SIMPLIFIED CRANE

PROBLEM TO BE SOLVED: To simply assemble, disassemble or fold a simplified crane by giving a moving function within the range of a fixed solid angle in a semispherical locus and a function capable of shifting a shaft fulcrum connected to a girder rail in an optional angle direction to a spherical bearing holding a shaft connected and fixed to the girder rail. SOLUTION: In the holding mechanism of a junction of both travel trolleys and a girder rail, the girder rail has a connected and fixed shaft, one spherical bearing 10 held by both travel trolleys has a bearing function within a fixed solid angle in a semispherical focus, and the other spherical bearing has the bearing function within the same range and a shift function in the fixed solid angle. When this simplified crane is fitted to a building skeleton, travel rails 3e, 3f, 3g are folding travel rails, and supports with an expansion adjusting mechanism 100, 101 and angle braces with an expansion adjusting mechanism 102, 103 are provided. The crane is easy to fit for a person unskilled in operation, it is excellent in portability, and it has high practicality and effectiveness.